Isekai Teni Shite Kyoushi ni Natta ga, Majo to Osorerareteiru Ken

Stripped of her life for reasons unknown, Aoi Konominato wakes up as a child in an unfamiliar world, still haunted by regret and goals left unfulfilled. After twelve years of learning under the tutelage of an elven sage named Owain, she’s mastered the art of sorcery and is sent by her wise—if eccentric—mentor to the renowned Fiddich Academy to serve as an instructor and further her studies.